cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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kfd_events.h (2868B)

      1/* SPDX-License-Identifier: GPL-2.0 OR MIT */
      2/*
      3 * Copyright 2014-2022 Advanced Micro Devices, Inc.
      4 *
      5 * Permission is hereby granted, free of charge, to any person obtaining a
      6 * copy of this software and associated documentation files (the "Software"),
      7 * to deal in the Software without restriction, including without limitation
      8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      9 * and/or sell copies of the Software, and to permit persons to whom the
     10 * Software is furnished to do so, subject to the following conditions:
     11 *
     12 * The above copyright notice and this permission notice shall be included in
     13 * all copies or substantial portions of the Software.
     14 *
     15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     21 * OTHER DEALINGS IN THE SOFTWARE.
     22 */
     23
     24#ifndef KFD_EVENTS_H_INCLUDED
     25#define KFD_EVENTS_H_INCLUDED
     26
     27#include <linux/kernel.h>
     28#include <linux/hashtable.h>
     29#include <linux/types.h>
     30#include <linux/list.h>
     31#include <linux/wait.h>
     32#include "kfd_priv.h"
     33#include <uapi/linux/kfd_ioctl.h>
     34
     35/*
     36 * IDR supports non-negative integer IDs. Small IDs are used for
     37 * signal events to match their signal slot. Use the upper half of the
     38 * ID space for non-signal events.
     39 */
     40#define KFD_FIRST_NONSIGNAL_EVENT_ID ((INT_MAX >> 1) + 1)
     41#define KFD_LAST_NONSIGNAL_EVENT_ID INT_MAX
     42
     43/*
     44 * Written into kfd_signal_slot_t to indicate that the event is not signaled.
     45 * Since the event protocol may need to write the event ID into memory, this
     46 * must not be a valid event ID.
     47 * For the sake of easy memset-ing, this must be a byte pattern.
     48 */
     49#define UNSIGNALED_EVENT_SLOT ((uint64_t)-1)
     50
     51struct kfd_event_waiter;
     52struct signal_page;
     53
     54struct kfd_event {
     55	u32 event_id;
     56
     57	bool signaled;
     58	bool auto_reset;
     59
     60	int type;
     61
     62	spinlock_t lock;
     63	wait_queue_head_t wq; /* List of event waiters. */
     64
     65	/* Only for signal events. */
     66	uint64_t __user *user_signal_address;
     67
     68	/* type specific data */
     69	union {
     70		struct kfd_hsa_memory_exception_data memory_exception_data;
     71		struct kfd_hsa_hw_exception_data hw_exception_data;
     72	};
     73
     74	struct rcu_head rcu; /* for asynchronous kfree_rcu */
     75};
     76
     77#define KFD_EVENT_TIMEOUT_IMMEDIATE 0
     78#define KFD_EVENT_TIMEOUT_INFINITE 0xFFFFFFFFu
     79
     80/* Matching HSA_EVENTTYPE */
     81#define KFD_EVENT_TYPE_SIGNAL 0
     82#define KFD_EVENT_TYPE_HW_EXCEPTION 3
     83#define KFD_EVENT_TYPE_DEBUG 5
     84#define KFD_EVENT_TYPE_MEMORY 8
     85
     86extern void kfd_signal_event_interrupt(u32 pasid, uint32_t partial_id,
     87				       uint32_t valid_id_bits);
     88
     89#endif